Mining is super hard..i dont get why were being punished for only being able to mine 1 electrum ore and or 1 cobalt ore at one time. What is the point of using producing gear if were only going to produce 1 of the said items?
Miners are not punished at all. It is completely the opposite. All players who don't have mining in the 35+ will be punished.
Prices on Cobalts and electrum ores will go up. If you mine less ores, their higuer values will make it up for it. So the miner who mined to sell these ores will be happy with this change, or not be disappointed, as it wont make a negative difference in their finance. At best, it will be better $ for them.
If you mined to gather these ores for crafting reasons... then it's still not a biggie, since you craft less, but these crafted items will have a better value. So, it makes it up. Now, if you mined to craft cobalt arrows for your archer, then ok, you can be disappointed a bit, since it means more time to gather and to produce your needed arrows. Just focus on getting electrum ores, sell them, and with the money, buy the cobalts. Then, you will be able to produce more arrows, since electrum will have a greater value.
The cobalt arrows isn't a big problem, since your BSM can craft a lot of cobalt arrowheads anyway. And with one arrow head, you produce a lot of arrows... you will almost not see a difference.